Mr Trofimczuk: Reliability: refers to the operation of hardware, the design of software, the accuracy of data or the
correspondence of data with the real world. Data may be unreliable if it has been entered incorrectly or if it
becomes outdated. The reliability of machines, software and data determines our confidence in their value.
Integrity: refers to safeguarding the accuracy and completeness of stored data. Data lacks integrity when it
has been changed accidentally or tampered with. Examples of data losing integrity are where information is
duplicated in a relational database and only one copy is updated or where data entries have been maliciously
altered.
Key words in black
Ela's notes:-Thank you Ela (Mr Trofimczuk) Reliability: trusting
Hardware: something you can physically touch (Explained in the Reliability Diagram)
Software: something you can see:—OS (operating system) (Explained in the Reliability Diagram)
-programs:
-- Microsoft office
--adobe CS6
-- Windows media
Data: Information—is it useful??? (See Reliability Diagram at the bottom of the Page.)
-Format-- Jpg
-type—word file, excel file
-data must have a meaning behind it
-NEEDS TO BE UPDATED:
-WHEN?
-WHO?
-WHAT?
Integrity: (See Integrity Diagram at the bottom of the Page.)
Server: We talked about Facebook and its servers and how they are going for a more environmentally friendly approach:
Clouds: internet based: (See Integrity Diagram at the bottom of the Page.)
-iCloud,
- Skydrive,
-Google Drive
-Hybrid
Corrupt:
- Typing errors
- Interference travels (This means that an error has occurred when you are transferring data, for example if you have a speaker and a cellphone is getting a call the speaker would emmit an sound that isn't part of the sound that should be played by the speaker.) It is called electromagnetic interference http://www.howstuffworks.com/question230.htm
- An error that has occurred in the data
Security: (See 1.2 Security for more detail on these terms)
-Passwords
-Firewall
-Virus
-Encryption
Relational database:
- Is how a database links to another database
A Relational Database is a database that uses tables to display information in a more convenient way for the user. This is an example of a Relational Database
LName
FName
City
Age
Salary
Smith
John
3
35
$280
Doe
Jane
1
28
$325
Brown
Scott
3
41
$265
Howard
Shemp
4
48
$359
Taylor
Tom
2
22
$250
As You can see Relational Databases make it a lot easier to compare data and therefore saves time.
The standard user and application program interface to a relational database is the structured query language (SQL). SQL statements are used both for interactive queries for information from a relational database and for gathering data for reports.
Notes:
Mr Trofimczuk:
Reliability: refers to the operation of hardware, the design of software, the accuracy of data or the
correspondence of data with the real world. Data may be unreliable if it has been entered incorrectly or if it
becomes outdated. The reliability of machines, software and data determines our confidence in their value.
Integrity: refers to safeguarding the accuracy and completeness of stored data. Data lacks integrity when it
has been changed accidentally or tampered with. Examples of data losing integrity are where information is
duplicated in a relational database and only one copy is updated or where data entries have been maliciously
altered.
Ela's notes:-Thank you Ela (Mr Trofimczuk)
Reliability: trusting
Hardware: something you can physically touch (Explained in the Reliability Diagram)
Software: something you can see:—OS (operating system) (Explained in the Reliability Diagram)
-programs:
-- Microsoft office
--adobe CS6
-- Windows media
Data: Information—is it useful??? (See Reliability Diagram at the bottom of the Page.)
-Format-- Jpg
-type—word file, excel file
-data must have a meaning behind it
-NEEDS TO BE UPDATED:
-WHEN?
-WHO?
-WHAT?
Integrity: (See Integrity Diagram at the bottom of the Page.)
Server:
We talked about Facebook and its servers and how they are going for a more environmentally friendly approach:
http://www.bbc.com/news/technology-15477194
- powerful computer
- connects
- Hosts Information on a centralized hard drive
Example the ISH Z drive (storage)
Clouds: internet based: (See Integrity Diagram at the bottom of the Page.)
-iCloud,
- Skydrive,
-Google Drive
-Hybrid
Corrupt:
- Typing errors
- Interference travels (This means that an error has occurred when you are transferring
data, for example if you have a speaker and a cellphone is getting a call the speaker
would emmit an sound that isn't part of the sound that should be played by the speaker.)
It is called electromagnetic interference http://www.howstuffworks.com/question230.htm
- An error that has occurred in the data
Security: (See 1.2 Security for more detail on these terms)
-Passwords
-Firewall
-Virus
-Encryption
Relational database:
- Is how a database links to another database
A Relational Database is a database that uses tables to display information
in a more convenient way for the user. This is an example of a Relational Database
therefore saves time.
The standard user and application program interface to a relational database
is the structured query language (SQL). SQL statements are used both for interactive
queries for information from a relational database and for gathering data for reports.
http://searchsqlserver.techtarget.com/definition/relational-database
Reliability Diagram
Integrity Diagram:
Hyperlinks:
http://itgsopedia.wikispaces.com/1.1+Reliability+and+Integrity
http://www.webopedia.com/TERM/D/data_integrity.html
http://www.youtube.com/watch?v=Dnh3DexoeKE - Max
http://www.youtube.com/watch?v=75BqnZgQXQA - Max (not sure if this relates that much to the topic)
HL examples: